Heather Has Had Several Headaches Recently

Heather has had several headaches recently. She made an appointment with her doctor because she was worried that she might have a serious problem (a brain tumor!) . Her doctor examined her and determined that she was just having tension headaches. Instead of being reassured, Heather immediately made an appointment with the best neurologist in town to have more definitive tests conducted that would support her self-diagnosis. If Heather has a psychological disorder it is MOST likely

A) hypochondriasis.
B) generalized anxiety disorder.
C) conversion disorder.
D) somatization disorder.